[#5391] For ad1836 and ad1981b, sometimes sound shakes at the end

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[#5391] For ad1836 and ad1981b, sometimes sound shakes at the end

Submitted By: Vivi Li

Open Date

2009-07-24 00:33:52     Close Date

2009-08-13 22:11:29

Priority:

Medium     Assignee:

Cliff Cai

Status:

Closed     Fixed In Release:

N/A

Found In Release:

N/A     Release:

Category:

Audio     Board:

N/A

Processor:

ALL     Silicon Revision:

Is this bug repeatable?:

Yes     Resolution:

Fixed

Uboot version or rev.:

    Toolchain version or rev.:

gcc4.1-09r1_rc9

App binary format:

N/A     

Summary: For ad1836 and ad1981b, sometimes sound shakes at the end

Details:

 

For ad1836 in bf533 and bf537, record and play at the same time, sound seems to repeat and shakes when it finishes.

 

--

arecord -t wav -c 2 -f S16_LE -r 48000 -d 5 |aplay

 

arecord -t wav -c 1 -f S16_LE -r 8000 -d 5 |aplay

 

arecord -t wav -c 1 -f S16_LE -r 48000 -d 5 |aplay

 

arecord -t wav -c 1 -f U8 -r 8000 -d 5 |aplay

 

arecord -t wav -c 1 -f U8 -r 48000 -d 5 |aplay

--

 

Follow-ups

 

--- Vivi Li                                                  2009-07-30 04:50:19

The same problem happens when I test ad1981b on bf527-ezkit. It's easy to

notice. Bellow is the example.

 

--

arecord -t wav -c 1 -f S16_LE -r 44100 -d 5 wav

aplay wav

--

 

--- Cliff Cai                                                2009-08-03 03:39:10

The shake effect is inevitable,the only way to alleviate is to shrink the

PCM_BUFFER_MAX.

 

Cliff

 

--- Cliff Cai                                                2009-08-03 22:43:33

I also found that if the driver is using copy callback to capture/playback

audio(AD1836 or AD1980 in copy mode),the shake effect is more obvious,while

using mmap way such effect is not audible.

 

Cliff

 

--- Vivi Li                                                  2009-08-11 05:47:16

It's OK now for ad1836.

 

--- Vivi Li                                                  2009-08-14 03:11:48

OK now. Close it.

 

 

 

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    Dependencies

    Duplicates

    Associations

    Tags

 

File Name     File Type     File Size     Posted By

config.audio_ad1836    application/octet-stream    32050    Vivi Li

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